Police tracked down and arrested a suspect in the killing of 35-year-old Wendy Martinez within 24 hours of her stabbing. Anthony Crawford of Northwest D.C., is being held without bond. News4's Justin Finch reports. (Published Friday, Sept. 21, 2018)

The 23-year-old man arrested and charged Thursday in the "unprovoked" fatal stabbing of a woman who was jogging through D.C.'s Logan Circle neighborhood was known to use the synthetic drug K2, according to court documents.

Police say surveillance video of the attacker in a distinct shirt and tips from the public helped them track down the suspect, Anthony Crawford of Northwest D.C., to a park near 14th and Girard streets NW Wednesday night.

Detectives who interviewed Crawford said they didn't provide details about the homicide for which he was arrested, but Crawford told them they were accusing him of the stabbing of a little girl, according to court documents.

He was charged with first-degree murder while armed. He is being held without bond.

Anthony Crawford
Photo credit: Metro Transit Police

Authorities had no information to suggest that the suspect and victim knew each other or had any interaction before the stabbing in one of D.C.'s most popular neighborhoods.

"It looks like it was an unprovoked attack," Police Chief Peter Newsham said.

Wendy Martinez of Northwest D.C. was out for a run just before 8 p.m. Tuesday when she was stabbed seven times to the head, neck and back. The 35-year-old, who had recently become engaged, was jogging west on P Street NW and was attacked after arriving at the intersection with 11th Street.

Newsham said Crawford has a criminal history, but there was no indication that any of it was violent.

A number of upscale homes and trendy restaurants are located near the scene of the crime.

"I think that it is unsettling for anyone who lives in this city to see something like this happen," Newsham said Thursday. "This is a very isolated instance. You don't see crimes much like this, even during the course of my career, so it's a very unlikely thing that occurred here at this intersection. At the same time, I'm sure that doesn't bring any level of comfort to the Martinez family."

Police released surveillance video Wednesday afternoon showing the attacker walking along 11th Street NW in a long-sleeve shirt that went down past his waist. Footage from another camera shows him walking with a knife in his hand. The knife used in the stabbing was found nearby.

Newsham said Thursday a combination of information from officers and tips from community members helped police identify Crawford as the suspect.

She and her boyfriend got engaged just last week, her family said in a statement.

"Wendy Karina Martinez was the light of our lives. Not only was she an avid runner, but she was a devout Christian, a wonderful friend, and a driven professional. Everything you hope that a daughter and a friend could be," her family said Wednesday. "She was also excited to be planning her upcoming wedding to her fiancé, Daniel Hincapie. They were engaged just last week."

Martinez was chief of staff of the software and data company FiscalNote.

"The entire FiscalNote family is shocked and deeply saddened to learn that Wendy Martinez, our Chief of Staff, was killed last night," the company said in a tweet Wednesday afternoon. "Wendy was an invaluable member of our team and a vibrant member of the community. Our thoughts and prayers are with Wendy’s family and friends."

Martinez was a University of Florida and Georgetown University graduate who previously worked for the Organization of American States and the Inter-American Development Bank, according to her LinkedIn page.

Martinez is from Palm Beach County, Florida, family members told NBC affiliate WPTV.